@article{JAC_2008__28_4_a3,
     author = {Azam, Saeid and Shahsanaei, Valiollah},
     title = {Extended affine {Weyl} groups of type $A_1$.},
     journal = {Journal of Algebraic Combinatorics},
     pages = {481--493},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2008__28_4_a3/}
}